A bar chart displays yearly sales figures for a company from 2014 to 2021, with values in millions and axes labeled via `d3.axisBottom` and `d3.axisLeft`. The React-based app uses D3 v5 to render an SVG, mapping data onto a band scale and linear scale. It reads its data from a hardcoded array, not the external CSV, and renders black bars with a 0.2 padding.